Champion Spark Plug (RC12YC). The spark plug ignites the fuel and air mixture in the engine's cylinder to power the engine. If the spark plug is has fouled (if the tip of the spark plug is burnt or damaged), the engine may not start or may run rough.

Briggs and Startton in-line fuel filter with 40 micron rating and 1/4" inlet & outlet. If the engine does not start then the fuel filter may be clogged and not allowing enough fuel to enter the carburetor.

Carburetor needle & seat kit. Comes with installation instructions. The float needle allows fuel to enter the float bowl. If the float needle is stuck closed, the engine will not get fuel and thus will not start.

Genuine OEM Part - Manufacturer #398188

When replacing the carburetor needle & seat, we recommend cleaning the fuel system and replacing the fuel filter.

Briggs & Stratton flywheel key. The flywheel key aligns the flywheel in the correct position on the crankshaft. If the engine stops suddenly due to hitting a hard object, the flywheel key shears in half to prevent damage to the engine. If the flywheel key is broken, the engine won't start.

$44.71

Lawn mower spindle assembly with pulley (6.3 DIA). The spindle assembly drives the lawn mower's blades. Be aware that the four mounting holes are not threaded—you will need to order four self-tapping screws.

Genuine OEM Part - Manufacturer #918-04822B

Be aware that the four mounting holes are not threaded&#8212;you will need to order four self-tapping screws.

MTD Spark Plug. The spark plug ignites the fuel and air mixture in the engine's cylinder to power the engine. If the spark plug is has fouled (if the tip of the spark plug is burnt or damaged), the engine may not start or may run rough.

Genuine OEM Part - Manufacturer #951-10292

$6.75

Single can of carburetor & choke cleaner-8oz. Made specifically for Briggs & Stratton engines, dissolves deposits in your carb and choke, reducing maintenance and downtime. Briggs & Stratton Original Equipment Manufacturer (OEM) parts are designed and engineered for Safety, Quality and Reliability.